12103242321 has 32 divisors (see below), whose sum is σ = 17218805760. Its totient is φ = 7545979584.

The previous prime is 12103242317. The next prime is 12103242323. The reversal of 12103242321 is 12324230121.

It is not a de Polignac number, because 12103242321 - 2² = 12103242317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12103242323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 550675 + ... + 572231.

It is an arithmetic number, because the mean of its divisors is an integer number (538087680).

Almost surely, 2^12103242321 is an apocalyptic number.

It is an amenable number.

12103242321 is a deficient number, since it is larger than the sum of its proper divisors (5115563439).

12103242321 is a wasteful number, since it uses less digits than its factorization.

12103242321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21765.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 12103242321 its reverse (12324230121), we get a palindrome (24427472442).

The spelling of 12103242321 in words is "twelve billion, one hundred three million, two hundred forty-two thousand, three hundred twenty-one".